261107876056 has 32 divisors (see below), whose sum is σ = 510447168000. Its totient is φ = 125059527936.

The previous prime is 261107876017. The next prime is 261107876063. The reversal of 261107876056 is 650678701162.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4401501 + ... + 4460428.

It is an arithmetic number, because the mean of its divisors is an integer number (15951474000).

Almost surely, 2^261107876056 is an apocalyptic number.

It is an amenable number.

261107876056 is a deficient number, since it is larger than the sum of its proper divisors (249339291944).

261107876056 is a wasteful number, since it uses less digits than its factorization.

261107876056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8862091 (or 8862087 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 49.

The spelling of 261107876056 in words is "two hundred sixty-one billion, one hundred seven million, eight hundred seventy-six thousand, fifty-six".